cbc3_enc.c revision 109998
155714Skris/* crypto/des/cbc3_enc.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include "des_locl.h" 6055714Skris 6159191Skris/* HAS BUGS! DON'T USE - this is only present for use in des.c */ 62109998Smarkmvoid DES_3cbc_encrypt(DES_cblock *input, DES_cblock *output, long length, 63109998Smarkm DES_key_schedule ks1, DES_key_schedule ks2, DES_cblock *iv1, 64109998Smarkm DES_cblock *iv2, int enc) 6555714Skris { 6655714Skris int off=((int)length-1)/8; 6755714Skris long l8=((length+7)/8)*8; 68109998Smarkm DES_cblock niv1,niv2; 6955714Skris 7055714Skris if (enc == DES_ENCRYPT) 7155714Skris { 72109998Smarkm DES_cbc_encrypt((unsigned char*)input, 73109998Smarkm (unsigned char*)output,length,&ks1,iv1,enc); 74109998Smarkm if (length >= sizeof(DES_cblock)) 75109998Smarkm memcpy(niv1,output[off],sizeof(DES_cblock)); 76109998Smarkm DES_cbc_encrypt((unsigned char*)output, 77109998Smarkm (unsigned char*)output,l8,&ks2,iv1,!enc); 78109998Smarkm DES_cbc_encrypt((unsigned char*)output, 79109998Smarkm (unsigned char*)output,l8,&ks1,iv2,enc); 80109998Smarkm if (length >= sizeof(DES_cblock)) 81109998Smarkm memcpy(niv2,output[off],sizeof(DES_cblock)); 8255714Skris } 8355714Skris else 8455714Skris { 85109998Smarkm if (length >= sizeof(DES_cblock)) 86109998Smarkm memcpy(niv2,input[off],sizeof(DES_cblock)); 87109998Smarkm DES_cbc_encrypt((unsigned char*)input, 88109998Smarkm (unsigned char*)output,l8,&ks1,iv2,enc); 89109998Smarkm DES_cbc_encrypt((unsigned char*)output, 90109998Smarkm (unsigned char*)output,l8,&ks2,iv1,!enc); 91109998Smarkm if (length >= sizeof(DES_cblock)) 92109998Smarkm memcpy(niv1,output[off],sizeof(DES_cblock)); 93109998Smarkm DES_cbc_encrypt((unsigned char*)output, 94109998Smarkm (unsigned char*)output,length,&ks1,iv1,enc); 9555714Skris } 96109998Smarkm memcpy(*iv1,niv1,sizeof(DES_cblock)); 97109998Smarkm memcpy(*iv2,niv2,sizeof(DES_cblock)); 9855714Skris } 9955714Skris 100